Sand-hopper construction



n.1. CAMPBELL.

SAND HOFPER CONSTRUCTION.

APPLICATION FILED'MAR.21.192|.

1,405,398; Patented Feb. 7, 1922;

III Il l lll/11111111 INVEHTOR DONALD CAMPBELL do `hereby declare thefollowing to be a full,

tion'for Patent Ser. No. 443,73),'led F eb.v

T0 ROBERT BJCAMPBEL'L, OF STH-I-IAVEN, MICHIGAN.

' SAND-HOPPER Specification of Letters Patent.

' iieaamaaiv Feb. "7, 192e.A

Application mea March 21, 1921. serial No. 454,194. c 1 Y To all whom tmay concern l Be it known that I, DONALD J. CAMPBELL, al citizen of theUnited States of America, residing at Muskegon Heights, in the county ofMuskegon and, State of Michigan', have invented certain new and usefulImprovements inSand-Hopper Construction; and I clear, and exactdescription of the invention, such as will enable others skilled in theart to which-it appertains vto make and use the same. f

This invention relates to sand hoppers and is particularly concernedwith improvements in hoppers such as may be used with pneumatic sandhandling machines,one c onstruction of which is shown in my applicali10, 1921.' Such machines make use lof the force of compressed air forforcing sand into moulds or core boxes to ram and com- 'press the sametothe4 necessary ldegree ofdensity and with my'invention, the force of.

the compressed air is conserved and practically none of itis lost ordissipated by eX- pansionkof the air laterally through aninert body ofsand such as would ,be thefcase if the hopper was ahollow shell withspaced apart outlet openings at the bottom.

'In running large jobs, the hopper lwill be made of metal and the'sandpassagesrthere.- through are defined by metal. sides. Many times,however, it is necessary to run a relatively small job, numbering only arelatively small number of moulds or cores-in which case it is noteconomical or advisable to go to the expense or to spend the timerequired to make a Special metal sand hopper therefor. Accordingly, thepresent invention has for its primary consideration Vthe 'constructionof'a hopperv in which a .hollow metal shell may be used and equippedwith an'A interior core or lling of easily worked material in which thesand passages may be easily formed, this filler beingplaced within theouter shell and used for the running of the particular relatively smalljob ordered, after which the filler may be removed and a different oneplaced in the shell for another job of; dier'ent character, the fillersbeing quickly and easily made and used, and being put in and taken outof theouter shell very quickly, and either discarded after theparticular job is done, or kept for future use should the saine be doneagain'.

noivALD J. CAMPBELL, or MUsnneoN HEIGHTS, momenti, AssIGNoR orown-FOURTH For an understanding. of the invention andthe constructionsembodying the same., reference may be had to theY following description,taken in connection with the ao. companying drawing, yin. which,

A Fig. 1 `is aV vertical section taken through ahopper made inaccordance with my invention.' 1 'i v, i v Fig. 2 is a horizontalsectionY taken substantially on the plane of line 2 2, of.

Fig. 1;

Fig. 3 is a sectional view similar to that shown in Fig. 1, but in`whicha larger number of sand filler. Fig. 4 is a-'view taken dicated bythe arrows.

, Fig. 5 is a vertical Asectional view'th'rough a fstillfurther formofhopper, andl cated by the arrows.V Like reference characters refertolike parts in the different gures 'of the drawing.

The outer shell 1 is of metal open at'its.. top and bottom and formedwith an out-I wardly extending liiangey 2 at its lower'end to which thelower outlet plate 3 be at-v passages are made through the l y y .ontheplaneof line' v 4-4 of F 1g. 3 and looking upwardlyas in- Fig. 6 is. ayview taken on the plane of line 6 6 of F 1g. 5, lookingl upwardly asindi,-l

With the present invention, a filler 5 is placed within the shell,.beingshapedf at itsV outer sides to t Vagainst the inner sides ofl theshell, and being held in place by the atf tachment of the plate 3. Thisfiller may be of any suitable easily worked-material, such as plaster ofParis, wood,or any other material of similar nature which may be eitherquickly worked ormoulded to the desired shape and which hasconsiderablev stability as to texture. lIn this filler, a plurality ofpassages 6 ,are made. from the lower "en'dt'o' the upper end inclininginwardly vtoward each other at their upper ends, and having their lowerends positioned directly over the` openings 4c in the plate 3. Thematerial between the inner adjacent sides oit the passages 6 is cut awaypartly so as to make a pointed portion 7, whereby sand entered into theupper portion of the hopper, to which portion the filler doe-s notreach, must all go into the passages and none will lodge on the centralportion of the iiller between the passagesV as would be the case it suchpointed portion 7 wasnot made.

The sand goes into the hopper at its upper end in the space indicated at8 from which it passes into the passages 6. Under the force oicompressed air introduced into the upper end of the hopper, the sand isforced downwardly in the passages at 6 and out through the openings ltothe mould. rEhe means for doing` this is no concern oit the presentinvention, which is directed to the ready and easy 'forming ot a i'illeri'or a hopper shell in accordance with the number of outlet openingsthrough the lower plate, one passage being made for each olf theoutlets. ln Figs. 8 and the same shell l andlower plate 3 is shown,except that the plate has a larger number of outlets, this necessitatinga correspondingly larger number ol2 said passages (3 in the filler 5awhich has the same outer form as filler 5. This illustrates the salientfeature of the invention, that is, the easy production ot differenttemporary fillers for the saine outer hopperY shell.

ln Figs. 5 and 6, a slight modiiication is shown, in which the shell lais elongated, having` a corresponding plate 3 attached thereto at itsunder side and the ller 5l has passages 6b therein leading downwardly tothe outlet openings through the plate. rlhese openings are in alineinentand the passages 6" are located one alter the other in the length of theiiller. This hopper accordingly has four consecutive outlet openings atthe bottom and is ot value in maling certain types of elongated moulds,as tor internal combustion engine blocks having tour cylinders; andanother filler with sii; sand passages therein and a lower plate 3 withsix outlets therein can be very readily placed therein itor a dili'erenttype or mould, as for '1; cylinde1 engine blocks, or for the productionot si); smaller moulds of any type that could be produced tour at a timewith the filler shown in Fig. 5. ln any case, whatever the type ofiiller used in the shell, it is apparent that .the iiller is quicklymade, and it is also obvious that the shelll itself is a simpleconstruction which can be quickly made for the type oit work desired,both the shell and filler when both must be made for a 'particular job,being produced much cheaperthan would be the case it the combineds'helland filler were made` as an integral casting.

l have shown several forms oi iiller and different shells that may beused, though vpense for each is small.

notanything like all of the forms which can be utilized in carrying outthe invention. The iiller made ol' easily worked or moulded. materialcan be made-in a very short time, and itt necessary, the outer shell canbe made in a very little longer time, while the eX- This is veryimportant where the lot of moulds to be run is not large enough towarrant theeinitial expense olf making a complete metal filler integralwith the shell of the hopper. The liller when it has served its purposecan be detached from the shell and a new filler' nected therewith, saidliller having a plu-V rality of sand passages therethrough,substantially as described. Y

Q. In combination, a hopper shell'open at its upper and lower ends, aplate having an outlet opening therein closing the lower end 01": thehopper, and a liller detachably held in the shell by said plate andhaving a sand passage therethrough extending upwardly :trom the outletopening to the upper en'd otthe liller, substantially as described. l

3. ln combination, a hopper vshell open at its upper and lower-ends, aplate having a plurality of outlet openingstherein closing the lower endof the shell, and a iiller detachably held in the shell by said plateand having a plurality of sand passages therethrough extending upwardly,one from `each outlet opening in the plate to the upper end of thefiller, substantially as described.

d. ln combination, a hopper shell, a filler detachably secured withinthe shell and having a plurality of sand passages therethrough extendingfrom the upper endet the liller downwardly therethrough,. said` shellhaving openings at the lower ends of said passages for the outwardpassage of sand forced into and through said passages, substantially asdescribed.

5. ln combination, a hopper shell, and a iiller therefor of easilyworked materialV having sand passages therethrough, said filler beingadapted to be detachably sercured within the shell for removal andreplaceinentiby other fillers, substantially as described. Y

6. ln combination, a hopper shell having an upwardly tapered upperportion, a plate having outlet openings therethrough closing the lowerend of the shellgmeans for detachably connecting the plate to theshell,v and a filler located in the shell vand held therein by theplate, said iiller having sand passages therethrough leading fromdirectly over the outlet openings in the plate to the upper end of thefiller and converging to'- lward each other at theirv upper ends,.substantially as described.

having outlet openings therein closing the lower end of the shell, meansfor detachably connecting the plate to the shell, a 'filler lo cated inthe shell and held therein by said plate, said filler terminating shortof the upper end of the shell and having a plurality of sand passagestherethrough extending from the lower to the upperl end of the lfiller,the lower end of each passage beingposi-` tioned directly over an outletopening through said p1ate, substantially asf de.-y p scribed. Y '7. Incombination', a hopper shell, a plate 8. In combination', a hoppershell, `and a ller detachably andreplaceably heldl in said hopper andhaving a pluralityof sand passages therethrough leading downwardlyy fromvthe upper end 'of the filler, substantiallr as described.

In testlmony whereof I aiix mysignature.

DONALD J. CAMPBELL. o

